241. ():
g = ;
u - ;
u - .
9,108 -1- 0,172 0,207 /2×. -1- (1:1) 0,05 /3 0,00134 /2×, .. .
, , .
242. . 6.
6
,% | |||||||
lg u. | 3,2 | 3,5 | -1,1 | -1,1 | -1,1 | -1,1 | 0,1 |
. NO > 40%? NO >95% ? , NO3 ?
243. : ? . ?
244. ? : ? ? . ?
245. . ? ? ? .
246. . :
iO2 + 22 i + 22?
D = -944 /; S = 30,6; SiO = 50 /×;
D = -242 /; S = 131; S = 189 /×.
247. , . nO2 = 293 ? .
D = -520 /; SMn = 32; SMnO = 53 /×;
D = -1675 /; Sl= 28; S = 51/×.
248. :
F + 2() Fe3O4() + 2
. , = 298 .
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D = -286 /; D = -1118 /;
S () = 70; S = 142; SF = 27; S = 131 /×.
249. -, , ? , , :
262 + 5N4NO3 5N2 + 2CO2 + 132
DG = - 319,45; DG = -183,96;
DG = -394,64; DG = -237,4 /.
250. 38 ( ) ?
251. = 1200 , u u2. , :
1) u + ½ 2 = uO; DG1. 2) 2u + ½ O2 = u2; DG2
C 1 2, , ? u2O uO 173 162 /, u2O, uO, u 2 92,9; 42,6; 33; 205,4 /×.
252. . :
u2O + 2 = 2u + 2
uO + 2 = u + 2
-, ( ). , u2O, uO 2 86,3; -129,4; -228,8 /, , ?
253. , . , . :
1) 2WC = W2C + C;
2) 2W + 2 = W2C + CO2.
, , 1250 . WC, W2C 2 41,0; -26 393,5 /, WC, W2C; , 2, 2 36; 82; 5,74; 205,4; 213,68 /×.
254. . . :
262() + 522() = 22() + 82 (),
D G = -454,5; D G = - 120,4;
D G = -228; D G = -394,6 /?
255. , . :
t . = + 1 t . + 2D ,
t . ;
D ;
, 1 2 .
, t. = 197,6.
D = - 389,4; D = -393,5; D = -242,8 /;
= -45,5; 1 = 0,83; 2 = -0,0082.
256. 210 . , 1000 . D = -242; D = -393,5; D = -307 /.
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257. :
3() () + 2(); D = 178 /.
150 , 8% ? ?
D = -1206; S = 89 /×;
D = -635 /; S = 40 /×;
D = -393 /; S 214 /×.
258. 62,5 , 20% , :
SO4 0,5H2O + 1,5H2O() SO4 2H2O; D..= -17 /.
?
D = -1575 /; S = 131 /×;
D = -286 /; S () = 70 /×;
D = - 2021 /; S = 194 /×.
259. 3. , ?
D = -1206 /; S = 89 /×;
D = -635 /; S = 40 /×;
D = -393 /; S 214 /×.
260. :
()2() + gSO4() = SO4() + g()2().
.
D = -996 /; S = 83 /×;
D = -1277 /; S = 92 /×;
D = -1424 /; S = 107 /×;
D = -925 /; S = 63 /×.
1 , . . : .
- .: , 2002 - 558 .
2 , .. : . - .: , 1979. - 559 .
3 , .. : . - .: , 2004. - 727 .
4 , .. : . - .: , 2002. - 746 .
5 , .. .
- .: , 1991. - 288 .
6 , .. . - .: , 1986. - 272 .
7 , .. . - .: , 1990. - 351 .
8 , .. . - .: , 1990. 319 .
9 , .. . - /: , 2004. - 446 . |
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1 ⅅ....3
2 ⅅ...9
3 酅.15
4 充20
5 ⅅ26
6 .31
6.1 ⅅ..31
6.2 ⅅ38
7 - 腅...42
8 47
9 ⅅ53
10 煅.....59
11 Ƹ ..64
12 .69
13 ꅅ.73
14 充...74